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Title: Evidence for the weakly coupled electron mechanism in an Anderson-Blount polar metal

Abstract

Over 50 years ago, Anderson and Blount proposed that ferroelectric-like structural phase transitions may occur in metals, despite the expected screening of the Coulomb interactions that often drive polar transitions. Recently, theoretical treatments have suggested that such transitions require the itinerant electrons be decoupled from the soft transverse optical phonons responsible for polar order. However, this decoupled electron mechanism (DEM) has yet to be experimentally observed. Here we utilize ultrafast spectroscopy to uncover evidence of the DEM in LiOsO3, the first known band metal to undergo a thermally driven polar phase transition (Tc ≈ 140 K). We demonstrate that intra-band photo-carriers relax by selectively coupling to only a subset of the phonon spectrum, leaving as much as 60% of the lattice heat capacity decoupled. This decoupled heat capacity is shown to be consistent with a previously undetected and partially displacive TO polar mode, indicating the DEM in LiOsO3.

Authors:
; ; ORCiD logo; ; ; ORCiD logo; ; ORCiD logo;
Publication Date:
Research Org.:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1619645
Alternate Identifier(s):
OSTI ID: 1597627
Grant/Contract Number:  
SC0012375; DE SC0010533; SC0010533
Resource Type:
Published Article
Journal Name:
Nature Communications
Additional Journal Information:
Journal Name: Nature Communications Journal Volume: 10 Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Laurita, N. J., Ron, A., Shan, Jun-Yi, Puggioni, D., Koocher, N. Z., Yamaura, K., Shi, Y., Rondinelli, J. M., and Hsieh, D.. Evidence for the weakly coupled electron mechanism in an Anderson-Blount polar metal. United Kingdom: N. p., 2019. Web. https://doi.org/10.1038/s41467-019-11172-2.
Laurita, N. J., Ron, A., Shan, Jun-Yi, Puggioni, D., Koocher, N. Z., Yamaura, K., Shi, Y., Rondinelli, J. M., & Hsieh, D.. Evidence for the weakly coupled electron mechanism in an Anderson-Blount polar metal. United Kingdom. https://doi.org/10.1038/s41467-019-11172-2
Laurita, N. J., Ron, A., Shan, Jun-Yi, Puggioni, D., Koocher, N. Z., Yamaura, K., Shi, Y., Rondinelli, J. M., and Hsieh, D.. Fri . "Evidence for the weakly coupled electron mechanism in an Anderson-Blount polar metal". United Kingdom. https://doi.org/10.1038/s41467-019-11172-2.
@article{osti_1619645,
title = {Evidence for the weakly coupled electron mechanism in an Anderson-Blount polar metal},
author = {Laurita, N. J. and Ron, A. and Shan, Jun-Yi and Puggioni, D. and Koocher, N. Z. and Yamaura, K. and Shi, Y. and Rondinelli, J. M. and Hsieh, D.},
abstractNote = {Over 50 years ago, Anderson and Blount proposed that ferroelectric-like structural phase transitions may occur in metals, despite the expected screening of the Coulomb interactions that often drive polar transitions. Recently, theoretical treatments have suggested that such transitions require the itinerant electrons be decoupled from the soft transverse optical phonons responsible for polar order. However, this decoupled electron mechanism (DEM) has yet to be experimentally observed. Here we utilize ultrafast spectroscopy to uncover evidence of the DEM in LiOsO3, the first known band metal to undergo a thermally driven polar phase transition (Tc ≈ 140 K). We demonstrate that intra-band photo-carriers relax by selectively coupling to only a subset of the phonon spectrum, leaving as much as 60% of the lattice heat capacity decoupled. This decoupled heat capacity is shown to be consistent with a previously undetected and partially displacive TO polar mode, indicating the DEM in LiOsO3.},
doi = {10.1038/s41467-019-11172-2},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United Kingdom},
year = {2019},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1038/s41467-019-11172-2

Citation Metrics:
Cited by: 7 works
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Works referenced in this record:

A ferroelectric-like structural transition in a metal
journal, September 2013

  • Shi, Youguo; Guo, Yanfeng; Wang, Xia
  • Nature Materials, Vol. 12, Issue 11
  • DOI: 10.1038/nmat3754

Ultrafast destruction and recovery of the spin density wave order in iron-based pnictides: A multipulse optical study
journal, July 2018


First-principles study of octahedral tilting and ferroelectric-like transition in metallic LiOsO 3
journal, May 2014


Raman phonons in the ferroelectric-like metal LiOsO 3
journal, February 2016


Ultrafast Electron Relaxation in Superconducting Bi 2 Sr 2 CaCu 2 O 8 + δ by Time-Resolved Photoelectron Spectroscopy
journal, November 2007


Crystal stability and the theory of ferroelectricity
journal, October 1960


Electronic correlations in the ferroelectric metallic state of LiOsO 3
journal, April 2016


Electron-phonon coupling and electron heat capacity of metals under conditions of strong electron-phonon nonequilibrium
journal, February 2008


Polar metals by geometric design
journal, April 2016


Dual nature of the ferroelectric and metallic state in LiOsO 3
journal, November 2014


Metallic ferroelectricity induced by anisotropic unscreened Coulomb interaction in LiOsO 3
journal, February 2015


Theory of thermal relaxation of electrons in metals
journal, September 1987


Femtosecond room-temperature measurement of the electron-phonon coupling constant γ in metallic superconductors
journal, April 1990


Ultrafast transient response and electron-phonon coupling in the iron-pnictide superconductor Ba ( Fe 1 x Co x ) 2 As 2
journal, July 2010


Symmetry Considerations on Martensitic Transformations: "Ferroelectric" Metals?
journal, February 1965


Femtosecond spectroscopy of electron-electron and electron-phonon energy relaxation in Ag and Au
journal, May 1995


Ultrafast carrier dynamics in the large-magnetoresistance material WTe 2
journal, October 2015


Gap-Dependent Quasiparticle Dynamics and Coherent Acoustic Phonons in CaFe 2 As 2 across Spin Density Wave Phase Transition
journal, April 2013

  • Kumar, Sunil; Harnagea, Luminita; Wurmehl, Sabine
  • Journal of the Physical Society of Japan, Vol. 82, Issue 4
  • DOI: 10.7566/JPSJ.82.044715

Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
journal, March 2016


A neutron powder investigation of the high-temperature structure and phase transition in LiNbO 3
journal, August 1994

  • Boysen, H.; Altorfer, F.
  • Acta Crystallographica Section B Structural Science, Vol. 50, Issue 4
  • DOI: 10.1107/S0108768193012820

Spin-lattice-electron dynamics simulations of magnetic materials
journal, May 2012


Band-dependent Quasiparticle Dynamics in Single Crystals of the Ba 0.6 K 0.4 Fe 2 As 2 Superconductor Revealed by Pump-Probe Spectroscopy
journal, July 2010


‘Ferroelectric’ metals reexamined: fundamental mechanisms and design considerations for new materials
journal, January 2016

  • Benedek, Nicole A.; Birol, Turan
  • Journal of Materials Chemistry C, Vol. 4, Issue 18
  • DOI: 10.1039/C5TC03856A

Electron-phonon interactions from first principles
journal, February 2017


Designing a robustly metallic noncenstrosymmetric ruthenate oxide with large thermopower anisotropy
journal, March 2014

  • Puggioni, Danilo; Rondinelli, James M.
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms4432

Crystal Stability and the Theory of Ferroelectricity
journal, November 1959


    Works referencing / citing this record:

    Charge transport in a polar metal
    journal, December 2019